Box-staying machine.



R. H. BITTER. BOX STAYiNG MACHINE. APPLICATION- FILED MAY 15. 1911.

Patented Oct. 23, 1917;

3 SHEETS-SHEET l.

//////////////l//l//////// M R. H. RITTER.

BOX STAYING MACHINE.

APPLICATION FILED MAY 15. an.

13%,82'? Patented 00*. 23, 1917.

3 SHEETSSHEET 2 MWEA/ 70!? mm.- F dz z e70 ef R. H. RlTTER. BOX STAYING MACHlNE. APPLICATION men MAY 15. 1917.

Patented Oct. 23, 1917.

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ROLA D H. BITTER, or PPnLAnnLPi-ini, PENNSYLVANIA, assieNoR To NATIONAL METAL EDGE BOX COMPANY, or PHILADELPHIA, PENNSYLVANIA, A oonroam 'rIoN OF PENNSYLVANIA.

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To all whom it may concern:

Be it known that I, ROLAND IL-RITTER, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Box-Staying Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to that class of machines in which a die is caused to descend upon a stationary anvil, between whicb'is placed a box and stay or other articles to be clamped together or compressed. v i

In box staying machines, such as" de-' scribed in connection with my invention, the anvil is usually of. rectangular cross section and positioned diamond-wise, with its horizontal active edge uppermost. Against this edge and contiguous surfaces the die descends and does its Work.

My invention may, however, be applied with equal effectiveness to machines in which anvil and die present round or flat horizontal surfaces between which the compression takes place.

in the operation, for example, of staying a box angle, the operator places the two sides to form said angle upon the faces of the anvil'contiguous to the active edge, and holds them close with his fingers durin the action of the die inthe application of the" stay. This requires that the operatorshall keep his fingers close to the'joint and yet not too' close. To decrease danger of acci-' dent and protect the operator, it is desirable to provide some safety device therefor.

The object of this invention 'is to provide such a safety device, wherein appropriate parts are'supplied, carried by the dieholder and projecting downwardly in advance of the die, and so positioned'as to contact with the operators fingers if'he has 'inadver tently'placed them within the danger zone, and thereby: be made-to immediately disconnec't the die holder' from its operating arm, and prevent its further descent toward the anvil. I

I will now describe in detail a machine embodying my invention, in connection with the which Figure l is a side elevation ofagbox'stay PoX-sTAYrNe" meantime.

accompanying drawings," in

S pecificaticnof Letters lPatent. Paimntedflit- 23, 1917. Application filed May 15, 1917; Serial No. 168,863.

Fig. 3*is an enlarged'elevational view of the part of the machine carrying in-' vention. 1 j Fig. 4 is an end view' -of parts shown'in' Fig. 3',"partly"in' section, showing my trip: ping mechanism.

Fig.5 isa similar view, to a larger scale, illustratingthe' tripping action. f Figffifis anlenlargedsectional plan View o-f-parts shown in Fig.4. 7 I Fig. 7 'is a'perspective view. of a' part of themachine carrying part'fof my device.

Fig. 8 is a similar view" showing another part of mydevice. Y

Fig. is an end view'of the; parts shown in Fig- 8'. a To understand the application of my invention to a boX staying machine, it is advisable to first explain the general construc-' tion and mode'of'operation of such a machine. V

The metal sta'ying strip a is carried on a drum I) at the rear of'the machine, an'd led through a throat o to the under side of the die Z, The strip is fed forward by a'pawl' e-"carried" by a block, which slides along throatc and isactuate'd bya bell-crank 7", which is given an oscillating movement by connection with 'tliemain crank pin 9, The

.st'a'yingstrip is held by'a pawl h as it-i's 'fed forward. I H

Die d is actuated vertically by an elbow lever j and a linlr'k, operated by a'con'necting'rod'm" from main crank pin. 9. The main crank is on a shaft n which is con nected-by gearing 0 with a driving shaft 19 carrying a belt pulley Q. A. foot lever 1' operates a clutch at r connecting shaft 17, with gearing 0,- suc'h that bypressin g down: the *foot lever the clutch is" opened and driving connection with the die holder isbroken; Inorder that stoppage of themachine may be instantaneous when this tal're's place, shaft nisengagedbyanadjustable-friction clamp s .-It-is" unnecessary to describe th'isme'chaI-nism infur'th er detail, as it isold andwell u nderstood'yin'the art.

Die cl iscarried" by a dieholder't slidabl'e in ways a on the frame ofthe machine. The, anvil o is} rigidly --mumed on "the frontfof a with the end said frame directly below the die. A. finger guard, of light frame construction, comprising yoke-shaped end pieces 10, is carriedbv the die holder, straddling the same at bbth ends, and supports horizontal guarding rods 11 on both sides of the die and slightly in advance thereof. These rods are supported close to the working edge of the die, not close enough to interfere with the normal working of the machine, but sufiiciently close to surely contact with the operators fingers if they should be in dangerous position, as shown in Fig. 4. The guard frame 10 is slidable vertically and when raised, as by contact with the operators'finger as before stated, it springs a catch, which instantly disconnects die holder t from its driving link 70, and arrests the downward movement of the die by means to be now described. V

The end of link is, which embraces pin 12 on the die holder, is cut away as shown in Fig. 3, not so'as to affect the normal raising and lowering of the die holder by the link, but so that the end of the link may be readily slipped ofl of pin 12, and thus instantaneously stop the action of the die holder with out stopping the machine. r

A bolt 13 is slidably mounted in the die holder, beneath and parallel to pin 12. Bolt 13'carries a cam face 14 which on occasion acts upon a pin 15 projecting from the end of link is to move said pin to one side, thus sliding the end of link is off of pin 12.

Bolt 13 is held out of action against a spring 16 by a latch arm 17 pivoted to the bolt at 170 in a cutaway portion thereof. When bolt 13 is pulled out, latch arm 17 is turnedfrom the horizontal down to the vertical position shown in Fig. 4, thus holding the bolt out. The latch arm is held in this position by its lower end being caught by a projection 18, see Figs. 6, 8 and 9. 7

Projection 18 is carried by a sleeve 19, turnable on the shaft 23 hereinafter mentioned and carries anactuating arm 21.

'A shaft. 23 passes through sleeve 19 and carries at each end arms 24, which also over' lay the die holder, and are provided with pins 25, which have loose hole connection pieces 10 of the before men V tioned guard frame. Spring 22 overlies arm 21 when the die holder is raised and serves to return this arm to normal position after the operation of the safetydevice, as hereinafter described.

Arm 21, connected with sleeve 19, carriesat its other end a pivoteddog, one end '26 of which overliesa lip 24 projecting from the contiguous arm 24, andthe other end 24 of which extends beside a short lever 28, and is held in .this position by a spring 29;

The mechanism so far described, except the spring 22, is carried by the die holder and moves with it. When the die, in desufiiciently to force latch arm 17 from proj ection 18, when said arm flies up to the hori zontal as indicated in Fig. 5-, resulting 1n the shooting of bolt 13 by its spring 16.

This disconnects link 1 from the die holder, as before described. Simultaneously O the serrated end 30 0f bolt 13 strikes the stationary head and prevents the further clescent of the latter to do harmto the operators fingers or otherwise. i a 7 Bolt 13 carries a ratchet toothed piece 30 on its inner end, and when the bolt is shot as just described, this serrated surface brings up against a finger 31 pivoted in the frame of the machine. At the following upward movement of the die holder, the serrated piece 30 will turn finger 31 about its pivot, which in rising will thus force bolt 13 away from it, until it is pushed out to its normal set aosition. In this outward movement of the olt, a pin 32 on the latch lever is con fined beneath a guide piece 33 and draws said lever down into latching position again with projection 18, the latter, together with the sleeve 19 and levers 21, being merely spring-held and yielding to allow the lever 17 to latch. .VVhen the latch has been sprung and the bolt shot as above described to disconnect the die holder from the driving mechanism, the following means is provided for linking it up again. j I

, An arm 34 is pivoted on the projecting end of pin 12 and extends upward having a slot which engages a pin 35 on link 70. When the linkis dlsconnected from the dieholder, 1t contlnueslts downward motion, and pin 35 slips downward in its slot. In thereturn motion, when lever j has'pulled link 0 up to reaches the upper end of the slot in, arm 34,

and this light pin and link begin toraise the However, pin'l2 is located, not

die holder. 1n the center line of link 73, but beyond said center line. Therefore, when the dieholder.

commencesto be lifted as described, pins 12 35 tend to straighten out into thev center line of'hnk 70 and drawsthe cut-away end of To arrange engaging position again with pin, 12, pin 35 were? frame have descended below the dangerline, say within a quarterinch of-the ranvil.

Thus the. guard frame may contact-With the workupon the anvil and be raised at every action of the machine, but just before that takes place, stop,36 ,will have turned lever 28, which in turn acts-upon the end 27 of the dog pivoted to arm 21,,to turn its other end 26outof engagement with lip 26L! on v arm 24c. Theiraising of theguardframe, therefore, merely raises the ends-of arms-24 and turns shaft, 23, connecting said arms. The dog being free from lip 24, arm 21 is not affected by this action and; sleeve 19 is not turned to trip the latch lever.

Having'now fully described my invention, whatl desire to claim and protect by Letters Patentiis: f

1. In safety stopsfor machinery, the combination with :a member the operation of which. it is desired to automatically arrest, of driving mechanism, a .releasabledriving connection between, the driving mechanism and said member, a tripping lever, means controlled byithe tripping lever to release said drivingmonnectioma guard carried by, and retractable relatively to, said member upon meetingan obstruction, connections between the guard ,and .the tripping, lever adapted, upon such retraction of the guard in the forwardmovement, to allow the operation of. the trippingglever and the driving connection releasing ,means,,and means, operable when the guard inits normal operation has passed in its forward movement beyond a predetermined .point, to vsever the connections betweenitheguard and the tripping lever, thereby preventing-the release of the'driving connection by the retraction of the guard. i 3.

2, In safety stops formachinely, the combinationywith a member the operation of which it is desired-to automatically" arrest, of driving mechanism, a releasable driving connection between thegdriving mechanism and said member, a tripping lever, means controlled, by the tripping lever; to release: said drlvmg connection, a guard carried by,

and retractable relatively to, said member, connections between the guard and the trip ping lever adapted, upon the retraction'of said guard in the forward movement of said member, to allow the operation of the tripping lever and the driving connection releasing means, means operable in the rearward movement of said member to restore to normal position said tripping lever and the said means controlled thereby, and means, operable when the guard in its normal operation has passed in its forward movement beyond a predetermined point, to sever the connections between the guard and the tripping lever, thereby preventing the release of the driving connection by the retraction of the guard.

, which lit is ,desired to automatically. arrest,

of driving mechanism, a releasable driving connection. between the; driv ng mechan sm and said member, a spring actuated bolt 7 adapted to. release said'driving connection, a. tripping o lever pivotally attached to said bolt, aguard carried by, and retractable relatively to, said-Inember,,and connections between the guardandthe tripping levernormally holding thelatter, in position to restrain the bolt from operation but adapted, upon theretraction, of the guard, to be operated to release the tripping lever, thereby allowingthe bolt to operate, 3 4, 111 safety stops for machinery, the, combination with a .member the operation ofiwhich'it is desired to automatically arrest, of driving mechanism, a releasable driving connection between the driving mechanism and said member, aspringactuated bolt adapted to release said driving connection, a tripping lever pivotally -attachedto said bolt, a guard carried by, and retractable relatively to, Said. member, connections between the guard and the tripping lever normally holdingthe latter in position to restrain vthe'bolt from operation but adapted upon the retractionof the guard,,to be operated to release the -trip ping lever, thereby allowing. the bolt to ope erate and swing thegtripping' lever away from looking position,m'eans operable in the rearward movement of said member tore,- turn the bolt, and, a guide, cooperatingwith the tripping lever, in the return movement of. the :bolt, to return the tripping lever to position to -latchwith said connections. 5

5;,In1safety stops for-machinery, the combination witha member the operation of which itis soughtto automatically arrest, off driving mechanism, a. releasable driving connection: between the driving mechanism andsaidmember, a guard carried by, and retractable relatively to, said member, a

tu-rnable; device, a pair of arms thereon, connecting means between said guard and said arms effecting the operation of the latter when the guard is so retracted, a contrivance adapted when actuated to effect the release of said driving connection and a tripping lever normallyheld in position by said turnable device to restrain said contrivance from actuation but adapted, when said arms are of driving mechanism, a releasable driving 1 connection between the driving mechanism and said member, a guard earned by, and

retractable relatively to, said member, a contrivance adapted when actuated to efi'ect the release of the driving connection, a turnable shaft and sleeve carried by said member, an arm on the shaft connected with said guard, an arm on the sleeve, a connection between said arms,-and a tripping lever normally held in position by'said sleeve to restrain said contrivance from actuation but adapted, when said arms are moved and said sleeve is turned by the retraction of the guard, to release said contrivance, thereby releasing the driving connection.

7 In safety stops for machinery, the combination with a member the operation of which it is sought to automatically arrest, of driving'mechanism, a releasable driving connection between the driving mechanism andsa id member, a guard carried by, and retractable relatively to, said member, a contrivance adapted when actuated toeffect the release of the driving connection, a turnable shaft and sleeve carried by said member, a pair of arms on the shaft connected with opposite ends of the guard, two arms on the sleeve located in proximity to the othertwo arms respectively, a connection between each two approximating arms, and a tripping lever normally held in position by said sleeve to restrain said contrivance from actuation but adapted, when said arms are moved and said sleeve is turned by the retraction ofthe guard, to release said contrivance, thereby-releasing the driving connection.

8.- In safety stops for machinery, the combination with a member the operation of which it is sought to automatically arrest, of driving mechanism, a releasable driving connection between the driving mechanism and sald member, a guard carried by, and

retractable relatively to, said member, acon trivan'ce adapted when actuated to effect the release of the driving connection, a trippinglever normally holding said contrivance Copies of this patent may be obtained for five cents each, by addressing Washington, D. G.

from operation, a turnable device normally holding said tripping lever in normal position but adapted to be turned to release the tripping lever and thus allow said contrivance to operate, an arm' on said turnable device, another movable arm connected with said guard and movable there'- by when the latter is retracted, a disruptable connection between said arms enabling the second arm to operate the first and thus turn said device and release the tripping lever, and means, operable when the guard in its normal operation has passed beyond a predetermined point, to disrupt the last named connection.

9. In safety stops for machinery, the combination with a member the operation of which it is sought to automatically arrest, of driving mechanism, a releasable driving mechanism between the driving mechanism and said member, a guard carried by, and retractable relatively to, said member, a contrivance adapted when actuated to effect the release of the driving connection, a tripping lever normally holding said contrivance from operation, a sleeve normally holding said tripping lever in normal position but adapted to be turned to release'the tripping lever and thus allow said contrivance to operate, arms at opposite ends of the sleeve, a shaft on which said sleeve turns, arms on opposite ends of the shaft, dogs, one at each end connecting an arm on the sleeve with the adjacent arm on theshaft,

means at opposite ends of the guardconnectingthe same with the arms on the shaft, and means, operable when the guard in its normal operation has passed beyond a predetermined point, to move saiddogs out of connecting position.

In testimony of which invention,,I have,

hereunto 'setmy hand, at Philadelphia. on this 10th day of May, 1917.

ROLAND H. BITTER the Commissioner of Patents, 

